anchovy.gui.behaviors.checkbehavior source code

1 /**
2 Copyright: Copyright (c) 2014 Andrey Penechko.
3 License: a$(WEB boost.org/LICENSE_1_0.txt, Boost License 1.0).
4 Authors: Andrey Penechko.
5 */
6 
7 module anchovy.gui.behaviors.checkbehavior;
8 
9 import anchovy.gui;
10 import anchovy.gui.interfaces.iwidgetbehavior;
11 
12 //version = Check_debug;
13 
14 
15 class CheckBehavior : IWidgetBehavior
16 {
17 	bool isHovered;
18 	bool isPressed;
19 	Widget _widget;
20 
21 public:
22 
23 	override void attachPropertiesTo(Widget widget)
24 	{
25 		widget.setProperty!("isChecked", bool) = false;
26 	}
27 
28 	override void attachTo(Widget widget)
29 	{
30 		version(Check_debug) writeln("attachTo ", widget["name"], " ", widget["type"], " ", widget["isChecked"]);
31 		_widget = widget;
32 
33 		widget.addEventHandler(&onClick);
34 		widget.addEventHandler(&pointerPressed);
35 		widget.addEventHandler(&pointerReleased);
36 		widget.addEventHandler(&pointerMoved);
37 		widget.addEventHandler(&pointerEntered);
38 		widget.addEventHandler(&pointerLeaved);
39 
40 		isHovered = false;
41 		isPressed = false;
42 
43 		widget.property("isChecked").valueChanged.connect( (FlexibleObject a, Variant b){updateState();} );
44 
45 		updateState();
46 	}
47 
48 	bool onClick(Widget widget, PointerClickEvent event)
49 	{
50 		widget.setProperty!"isChecked"(!widget.getPropertyAs!("isChecked", bool));
51 
52 		version(Check_debug) writeln("onClick");
53 
54 		return true;
55 	}
56 
57 	bool pointerPressed(Widget widget, PointerPressEvent event)
58 	{
59 		if (event.button == PointerButton.PB_LEFT)
60 		{
61 			isPressed = true;
62 		}
63 
64 		updateState();
65 
66 		version(Check_debug) writeln("pointerPressed");
67 
68 		return true;
69 	}
70 
71 	bool pointerReleased(Widget widget, PointerReleaseEvent event)
72 	{
73 		if (event.button == PointerButton.PB_LEFT)
74 		{
75 			isHovered = true;
76 			isPressed = false;
77 		}
78 
79 		updateState();
80 		version(Check_debug) writeln("pointerReleased");
81 
82 		return true;
83 	}
84 
85 	bool pointerMoved(Widget widget, PointerMoveEvent event)
86 	{
87 		return true;
88 	}
89 
90 	bool pointerEntered(Widget widget, PointerEnterEvent event)
91 	{
92 		if (event.context.eventDispatcher.pressedWidget is this)
93 		{
94 			isPressed = true;
95 			version(Check_debug) writeln("pressed");
96 		}
97 		else
98 		{
99 			isHovered = true;
100 			version(Check_debug) writeln("pointerEntered hovered");
101 		}
102 
103 		updateState();
104 		return true;
105 	}
106 
107 	bool pointerLeaved(Widget widget, PointerLeaveEvent event)
108 	{
109 		isHovered = false;
110 
111 		version(Check_debug) writefln("pointerLeaved isHovered %s", isHovered);
112 		updateState();
113 
114 		return true;
115 	}
116 
117 	// normal_unchecked == normal
118 	static const string[6] stateStrings = ["normal", "normal_checked", "hovered_unchecked",
119 	 "hovered_checked", "pressed_unchecked", "pressed_checked"];
120 
121 	void updateState()
122 	{
123 		version(Check_debug) writefln("%s %s isHovered %s", _widget["name"], _widget["type"], isHovered);
124 
125 		uint checked = _widget.getPropertyAs!("isChecked", bool) ? 1 : 0;
126 		uint hovered = isHovered ? 2 : 0;
127 		if (isPressed) hovered = 4;
128 
129 		version(Check_debug) writefln("checked %s hovered %s pressed %s %s", _widget.getPropertyAs!("isChecked", bool)
130 		 , hovered, isPressed, stateStrings[checked | hovered]);
131 
132 		_widget.setProperty!"state"(stateStrings[checked | hovered]);
133 	}
134 }